---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Mon 06/06/22: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:59 AM - Re: simple antenna for 704 mHz (nuckollsr) 2. 07:47 AM - Re: Re: simple antenna for 704 mHz (rd2) 3. 01:44 PM - Re: 30A PM alternator and Z101? (johnbright) ________________________________ Message 1 _____________________________________ Time: 05:59:17 AM PST US Subject: AeroElectric-List: Re: simple antenna for 704 mHz From: "nuckollsr" Rumen, did you resolve your antenna issue? If not, I may have a potential solution. I've got a 'thru the roof' antenna I built for a local EMS member that's too long (465 Mhz) that can be cut down to accommodate your target frequency. It was originally intended to poke thru a metal roof via 5/8" hole and bond to the inside surface for weather sealing. It would also work nicely thru a side wall of the building. It's only a 4" 'spike' protruding off the surface . . . unobtrusive. Easily removed and patched in future. I can dig it out and trim to your requirements. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=507136#507136 Attachments: http://forums.matronics.com//files/06062207531_212.jpg ________________________________ Message 2 _____________________________________ Time: 07:47:54 AM PST US From: rd2 Subject: Re: AeroElectric-List: Re: simple antenna for 704 mHz Bob, thanks, not necessary at this point - - I ended up experimenting and building a coax 1/2 wave dipole antenna inspired by a ham operator. I purchased some 15' of coax with SMA on one end, removed the insulation at 1/4 Y, exposed 1/4 Y of the center conductor, folded back 1/4 Y of the braid over the coax and finished over w/heat shrink tubing, thus making, as an extension of the coax, a quick and simple 1/2Y antenna not requiring a ground plane. Inside my "faraday cage" the signal now is 6 dB better than with the original antenna. Not enough, but more stable. If the box doesn't go offline in future weeks/months, this temp solution becomes permanent, otherwise will poke it out through a 1/4" hole on the side wall. Rumen ----- Original Message ----- From: nuckollsr Sent: Mon, 06 Jun 2022 08:58:41 -0400 (EDT) Subject: AeroElectric-List: Re: simple antenna for 704 mHz Rumen, did you resolve your antenna issue? If not, I may have a potential solution. I've got a 'thru the roof' antenna I built for a local EMS member that's too long (465 Mhz) that can be cut down to accommodate your target frequency. It was originally intended to poke thru a metal roof via 5/8" hole and bond to the inside surface for weather sealing. It would also work nicely thru a side wall of the building. It's only a 4" 'spike' protruding off the surface . . . unobtrusive. Easily removed and patched in future. I can dig it out and trim to your requirements. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=507136#507136 Attachments: http://forums.matronics.com//files/06062207531_212.jpg ________________________________ Message 3 _____________________________________ Time: 01:44:19 PM PST US Subject: AeroElectric-List: Re: 30A PM alternator and Z101? From: "johnbright" I exchanged emails with Bill Judge at Monkworkz. He expressed concern the battery alternator's regulator could register an OV event if the battery alternator relay was opened while the alternator is delivering significant current. What I came up with is a progressive off / enable / on switch for the regulator and a Schottky diode to shunt any voltage spike to the battery. Ref attached pdf and its notes 2, 7, and 8. -------- John Bright, RV-6A, at FWF, O-360 Z-101 single batt dual alt SDS EM-5-F. john_s_bright@yahoo.com, Newport News, Va https://drive.google.com/folderview?id=1u6GeZo6pmBWsKykLNVQMvu4o1VEVyP4K Read this topic online here: http://forums.matronics.com/viewtopic.php?p=507139#507139 Attachments: http://forums.matronics.com//files/elec_schem_with_monkworkz_mz_30l_as_backup_and_z101_as_a_template_rev_draft_3_165.pdf ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.